<!DOCTYPE html>
<html>
<head>
    <meta charset='UTF-8'>
    <title>下拉菜单01</title>
    <style>
        .dropdown{
            background: green;
            color: white;
        }
        .dropdown-content{
            display: none; 
        }
        .dropdown:hover .dropdown-content{
            display: block;
        }
    </style>
</head>
<body>
    <h1>下拉菜单v0.1</h1>
    <div class="dropdown">
        <span>指着我</span>
        <div class="dropdown-content">
            <ul>
                <li><a href="">fuck you</a></li>
                <li><a href="">fuck you</a></li>
                <li><a href="">fuck you</a></li>
            </ul>
        </div>
    </div>
    <p>
        只用了两个核心的东西：display和:hover。
        当然效果相当差
    </p>
</body>
</html>